KR19990051266A - Automatic recording device of video cassette recorder - Google Patents

Abstract

The present invention relates to a video cassette recorder, wherein the audio level detector 20 outputs a high level logic when the audio signal received by the tuner 11 is equal to or higher than a predetermined level, and the high pass level detector 30 transmits the tuner 11. The audio level detector 20 and the high-frequency level detector 30 output high-level logic when the audio level belonging to the crowd band of the audience is greater than or equal to a predetermined level. When outputting, a high level recording time signal is output, and the microcomputer 12 causes the video cassette recorder to record the received signal of the tuner 11 on the video tape for a predetermined time when this recording time signal is applied.

Description

Automatic recording device of video cassette recorder

The present invention relates to a video cassette recorder, and more particularly, to a recording apparatus of a video cassette recorder capable of automatically recording a main scene of a program being watched.

The video cassette recorder is an imaging device that records video signals on a video tape by using the magnetism of the video tape, or reads and reproduces the video signals recorded on the video tape.

Some video cassette recorders allow a broadcast video signal to be recorded on a video tape by configuring a tuner capable of receiving a broadcast signal therein.

As a method of recording a broadcast signal to a video tape using such a video cassette recorder, there is a scheduled recording method in which a user reserves a time and a channel to perform recording by using a timer in the video cassette recorder, and the video cassette recorder is received by the tuner. It can be classified into immediate recording method that allows video signal to be recorded immediately.

On the other hand, if a general user needs to record while watching a program of a predetermined broadcast channel using a tuner of the video cassette recorder, recording is possible by switching the video cassette recorder to a recording mode as described above. This method causes considerable inconvenience in broadcasting programs such as sports. In other words, the general viewer is a main scene of sports, such as a goal device in soccer, and in order to record a home run or hit scene in baseball, the user must have a device such as a remote controller that can switch the video cassette recorder to a recording mode. However, it is inconvenient to operate the setting and release of the recording mode one by one.

SUMMARY OF THE INVENTION The present invention has been made in view of this point, and an object of the present invention is to provide an automatic recording apparatus of a video cassette recorder which automatically records only main scenes in a sports broadcast.

The present invention for achieving this object is a video having a recording processing system for reproducing a signal received by the tuner in accordance with a reproduction control signal, and a deck for recording signals of the recording processing system to a video tape in accordance with the reproduction processing signal. A cassette recorder, comprising: an envelope level detector for detecting an envelope of an audio signal of a tuner, and an audio level detector having a comparator for comparing an output of the envelope detector with a predetermined reference voltage; A high pass filter for detecting and outputting only an audio signal having a predetermined bandwidth among the audio signals of the tuner, an envelope detector for detecting an envelope of the audio signal filtered by the high pass filter, and an output of the envelope detector is compared with a predetermined reference voltage. A high pass level detector having a comparator; A combination unit for combining the outputs of the audio level detector and the high pass level detector to output a recording time point signal; And a microcomputer for outputting the recording control signal for a predetermined time according to the output of the combination unit.

1 is a block diagram of an automatic recording apparatus of a video cassette recorder according to the present invention;

2 is a block diagram of a recording time detection unit configured in an automatic recording apparatus of a video cassette recorder according to the present invention;

3 is an operation flowchart of an automatic recording apparatus of a video cassette recorder according to the present invention.

<Description of the symbols for the main parts of the drawings>

11: tuner 12: micom

13: recording processing system 14: modulator

15: recording time detection unit 16: deck

17: playback processing system 18: OSD unit

19: key matrix 20: audio level detector

21: envelope detector 22: comparator

30: high pass level detector 31: high pass filter

32: envelope detector 33: comparator

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of an automatic recording apparatus of a video cassette recorder according to the present invention, which includes a tuner 11, and the tuner 11 receives a signal of a channel corresponding to a tuning signal of the microcomputer 12 to receive an image and The audio signal is applied to the recording processing system 13 and the modulator 14 while the audio signal is applied to the recording time detection unit 15.

The recording processing system 13 is configured to record the received broadcast signal of the tuner 11 and apply it to the deck 16 in accordance with the recording control signal of the microcomputer 12, and the deck 16 of the microcomputer 12. It is configured to drive in the drive mode according to the control. That is, the deck 16 drives in the recording mode when the recording control signal is applied from the microcomputer 12 to record the broadcast signal of the recording processing system 13 on the magnetic tape, and when the reproduction control signal is applied from the microcomputer 12 It is configured to drive in the reproduction mode to read out the broadcast signal recorded on the magnetic tape and apply it to the reproduction processing system 17.

In addition, the deck 16 of the present invention can be driven in various modes such as a fast playback mode and a pause mode according to a drive control signal from the microcomputer 2, and the video tape in the deck 16 can be driven. A loading signal indicating whether or not loading is applied to the microcomputer 12. The driving mode of the deck and its driving mechanism are technical matters that can be easily understood by those skilled in the art, and thus, detailed descriptions thereof are omitted.

The reproduction processing system 17 applies an image signal, which is an image signal and audio signals, reproduced and output, to the OSD unit 18, while the audio signal is applied to the modulator 14.

The video signal of the reproduction processing system 17 and the received video signal of the tuner 11 are applied to the OSD unit 18, and the OSD unit 18 is a predetermined text signal corresponding to the OSD control signal of the microcomputer 12, or The blue back signals are mixed with the video signals of the tuner 11 and the reproduction processing system 17 and output.

On the other hand, the OSD unit 18 is connected to the modulator 14, the modulator 14 receives the output signal of the OSD unit 18 or tuner 11 under the control of the microcomputer 12, the predetermined channel (3 or 4). Channel) or output the input video signal in its original state without being modulated.

Meanwhile, as shown, the key matrix 19 is connected to the microcomputer 12, and the function key (channel selection key (consisting of numeric keys), channel up / down key, power on / off key) of the key matrix 19 is connected. , A playback key, a recording key, etc.), and the microcomputer 12 performs the operation as described below in response to the driving of these keys, and performs the present invention by the recording time signal from the recording time detection unit 15. do.

That is, the recording time detector 15 is composed of an audio level detector 20, a high frequency level detector 30, and a combination unit 40 as shown in FIG.

Here, the envelope detector 21 in the audio level detector 20 detects the audio signal envelope of the tuner 11 and applies it to the comparator 22, which complies with the output voltage of the envelope detector 21 and the predetermined voltage. The reference voltages are compared to output high-level logic when the output voltage of the envelope detector 21 is equal to or higher than the reference voltage. In the present invention, the reference voltage of the comparator 22 is greater than the average voltage of the audio signal received by the tuner 11, and, for example, the audio signal generated when the audio level rises rapidly due to the shout of the audience in the main scene of the sport. Set to voltage.

As illustrated, the high pass level detector 30 detects and outputs only an audio signal having a predetermined bandwidth among the audio signals of the tuner 11. Here, the band to be filtered by the high-band filter 31 is generally set to the shout band of the audience. The audio signal filtered by the high band filter 31 is applied to the envelope detector 32, and the envelope detector 32 detects and outputs the output envelope of the high band filter 31. The envelope in the envelope detector 32 is applied to the comparator 33, and the comparator 33 is configured to compare the envelope voltage with a predetermined reference voltage and output a high level logic when the envelope voltage is equal to or greater than the reference voltage. Here, the reference voltage is set to the envelope voltage by the shout of the general audience.

The logic signals of the audio level detector 20 and the high-frequency level detector 30 are applied to the combiner 40, and the combiner 40 is composed of an end gate G1 as shown, so that the audio level detector 20 is provided. And outputs a high level logic signal only when the high level level detection section 30 applies a high level. The high level logic outputted by the AND gate G1 is referred to as a recording time signal in this specification. The reason why the audio level detector 20 and the high frequency level detector 30 are used to determine whether the audience is shouted can be accurately determined whether the audience is shouted using only the audio level or the in-band audio level. This is so that the recording point signal is output only when both of these conditions are satisfied.

The operation flowchart performed by the microcomputer 12 in the video cassette recorder thus constructed is shown in FIG.

As shown, the microcomputer 12 determines whether the current sport simple recording mode is set (S1). The sports simple recording mode may be simply set using the key of the key matrix 19 described above.

As a result of the determination in step S1, if the simple sports recording mode is set, a broadcast of a predetermined channel is received by the current VCR mode, that is, the tuner 11, and the received signal of the tuner 11 is modulator 14; It is determined whether the modulated channel 3 or 4 channel output mode through (S2).

As a result of the determination in step S2, it is determined whether the current driving mode is the recording mode in the VCR mode (S3), and the flow proceeds to step S4 in the non-recording mode.

In step S4, the microcomputer 12 determines whether the video tape is loaded by the loading signal in the deck 16, and if the video tape is loaded, the process proceeds to step S5. In step S5, the microcomputer 12 determines whether a recording time signal of high level logic is applied from the combination unit 40. The application of the recording time signal means that the audience is shouting in the broadcast channel being received by the tuner 11 as described above, and in the case of sports broadcasting, it is a scene such as a main scene, a home run, a goal goal, or the like. can do.

When the recording time signal is applied in step S5, the microcomputer 12 outputs the recording control signal (S6) to drive the recording processing system 13 and the deck 16 in the recording mode and is received by the tuner 11. The broadcast signal is recorded on the video tape. In this case, the main scene in the sports will be said to have already passed, but in general sports broadcasting, the main scene is generally broadcast again, so it can be seen that recording of the main scene is possible.

On the other hand, since there is no need to keep such a recording mode continuously, the microcomputer 12 stops performing the recording mode, i.e., outputs a stop control signal (S8) after a predetermined time has elapsed (S8). Return to.

As described above, the present invention can automatically record only the main scene by using the shout of the audience during the watching of the sports broadcast.

As can be seen from the above description, the present invention has the effect of automatically recording the main scene of the sports scene, thereby improving the convenience of use.

Claims (1)

A recording processing system 13 for reproducing a signal received by the tuner 11 in accordance with a reproduction control signal, and a deck 16 for recording a signal from the recording processing system 13 to a video tape in accordance with the reproduction processing signal. In the video cassette recorder provided, An audio level detector (20) having an envelope detector (21) for detecting the envelope of the audio signal of the tuner (11), and a comparator for comparing the output of the envelope detector (21) with a predetermined reference voltage; A high pass filter 31 which detects and outputs only an audio signal having a predetermined bandwidth among the audio signals of the tuner 11, and an envelope detector 32 which detects an envelope of the audio signal filtered by the high pass filter 31. A high pass level detector (30) having a comparator (33) for comparing the output of the envelope detector (32) with a predetermined reference voltage; A combiner 40 for combining the outputs of the audio level detector 20 and the high frequency level detector 30 to output a recording time point signal; And a microcomputer (12) for outputting the recording control signal for a predetermined time according to the output of the combination unit (40).